#668391
Closest named color: Steel Grey (#6F828A). oklch(59.3% 0.039 229), rgb(102, 131, 145).
Aa
Black text reads best on this color (5.22:1).
About this color
#668391 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 59%, its chroma 0.039 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.014 away. Black text reads best on it, at 5.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.22:1 |
| White text | 4.02:1 |
Values
| HEX | #668391 |
| RGB | rgb(102, 131, 145) |
| HSL | hsl(200, 17%, 48%) |
| OKLCH | oklch(59.3% 0.039 229) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #668391 | 4.02:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #668391 | 5.22:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #668391 text on white | 4.02:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #668391 text on black | 5.22:1 | AA | Lc -34.2 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEC
oklch(93.5% 0.005 228.8)
-
Step 200
200
#D3DADE
oklch(88.4% 0.009 232.4)
-
Step 300
300
#B5C3CA
oklch(80.9% 0.018 229.1)
-
Step 400
400
#8FA4AF
oklch(70.6% 0.029 230.6)
-
Step 500
500
#738E9B
oklch(63% 0.036 228.7)
-
Step 600
600 (this color)
#668391
oklch(59.3% 0.039 229)
-
Step 700
700
#4B6571
oklch(49.1% 0.036 228)
-
Step 800
800
#3E525C
oklch(42.6% 0.03 229.9)
-
Step 900
900
#35444C
oklch(37.7% 0.024 231.5)
-
Step 950
950
#1F282C
oklch(27% 0.015 226.6)
#668391 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #7C8292 | 0.030 |
| Deuteranopia (no green cones) | #767C91 | 0.028 |
| Tritanopia (no blue cones) | #598787 | 0.028 |
| Achromatopsia (no color) | #7F7F7F | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668391
#668391
oklch(59.3% 0.039 229)
- #92786A
#92786A
oklch(59.3% 0.039 49.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #668391, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.014
- Slate Gray #708090 ΔE 0.015
- Grey Blue #647D8E ΔE 0.018
- Steel #738595 ΔE 0.020
- Battleship Grey #6B7C85 ΔE 0.023
- Light Slate Gray #778899 ΔE 0.030
- Lavender Gray #7E7F9A ΔE 0.039
- Gray #808080 ΔE 0.040
Use #668391 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.